What is SpaceFN and why you should give it a try
The SpaceFN concept - setting up your space key as a layer switch when held - is probably one of the most useful tweaks in the keyboard hobby. Let me explain how it works. My SpaceFN article on kbd.news made some rounds recently - quite surprisingly given the age of this concept. This piece you're reading is a condensed version of the full post. If you're left with unanswered questions, you'll most likely find the info you're looking for in the original write-up. On my imaginary top list of the most useful keyboard features, tweaks and hacks, SpaceFN would deserve a podium finish for sure. But what makes it so special? In short: SpaceFN is easy to implement, easy to learn, costs nothing, can be used with any keyboard, and can improve your productivity instantly. I will list its benefits below, but can state right at this point that the SpaceFN concept, setting up your space key as a layer switch when held, is clearly one of the most useful tweaks in the keyboard hobby....
Apr 30, 2024
Quoting SamFlynn: " I have one of these, and I want to break the code and reprogram. Does anyone know what we are dealing with in the controller before I desolder mine to the max? I really want to write my own firmware for mine since it does not send Numpad codes, but number rows...yuk. " & " Nope. The problem is that the controller is very simplistic and requires a hardware rewriter in order to make changes. I tried the USB to USB converter made by Hasu, but it will not work at all. (Any Varmilo brand keyboards I have tried have the same result) I think we're stuck... "
P.S. I have one and ran into the same issue which lead me to bookmark that thread for future drops in case people were wondering.
Finally, he will make custom sized switch testers if you want to have them ALL in one place.